Dear Bob
Thank you very much for the precious advise. It is just what I was looking for.
Andrew, Also thanks for the reply.
Concerning my Apple enterprise comments, what I mean is that Apple has never really penetrated the enterprise market. They have expensive products that are less reliable in comparison to Windows and with an after sales service that is extremely poor. In france, where I live, it is non-existent.
I also oversee large Avid installations which, like Avid or not, offer a very efficient enterprise class service and solution. Yes, it is not the same price at all and in reality not really the same market, but all the same an ISIS or Unity are still just media server. But that is where the comparison ends. I tried running 25 workstations using Active Directory on an xserve with xsan. It was a disaster. I don’t get these problems with Avid or other enterprise oriented products. All the same, personally I would buy a mac over a PC any day.